名词
中文翻译：循环系统
同义词：
['circulatory system', 'cardiovascular system']
例句：
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1.The doctor explained the importance of maintaining a healthy circulatory system.
医生解释了保持健康循环系统的重要性。
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2. The researcher found that the cardiovascular system plays a crucial role in human health.
研究者发现心血管系统在人类健康中起着至关重要的作用。
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3.The study focused on the development of the circulatory system in early mammals.
该研究关注了哺乳动物早期循环系统的发育。